Abstract
In this study, a novel technique for biosynthesizing of gold nanoparticles (GNPs) using Withania somnifera as reductants and stabilizers is reported. Biosynthesis of anisotropic gold nanoparticles using ethanolic extract of Withania somnifera leaf and their potential as IR blockers has been demonstrated. The phenolic groups (–OH) residue was identified as the active functional group for gold ion reduction. These gold nanoparticles were characterized by of UV–Vis spectrophotometer, FTIR, TEM. The presence of proteins was identified by FTIR, UV–Vis and fluorescence spectroscopy. The micrograph revealed the formation of anisotropic gold nanoaprticles. The characteristics of the nanoparticles formed suggest application of gold and gold nanoparticles as chemical sensors in the future. Given the simple and eco-friendly approach for synthesis, these nanoparticles could easily be commercialized for large scale production. The present research opens a new avenue for the green synthesis of nanomaterials.
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